After the jujube fruit enters the expansion period, it consumes a lot of nutrients stored in the tree due to heavy vegetative growth and reproductive growth, and it is just when the nail mouth has just healed. It is a key period for the root system to quickly absorb nutrients. Therefore, the weak jujube tree, lack of nutrition, and the ability to resist external adverse factors are often reduced to yellow leaves, fallen leaves, and fruit. Therefore, the management of the expansion period is of great significance to increase the yield of jujube trees. During the expansion period of anti-dropping young fruit, the fruit often suffers from physiological fruit drop due to insufficient nutrient supply. In order to reduce fruit drop, the strong fruit can be sprayed in the canopy, once every 7 to 10 days, and sprayed continuously for 2 to 3 times. Fertilization without top dressing should take advantage of favorable conditions after rain or timely top dressing before watering. During the fruiting period, jujube trees were fed with 0.8-1 kg of diammonium phosphate and 1 kg of potassium sulfate to improve the nutritional level and disease resistance of the tree. The main pests in the prevention and treatment of fruit and insect pests during the fruit expansion period are peach worms, red spiders, etc. Special attention should be paid to prevention and control. If the prevention and control is not timely, it will cause serious leaves and fruits. Can choose 4.5% lambda cypermethrin emulsifiable concentrate or 15% pyridaben emulsifiable concentrate 1500～2000 times solution + new high fat film for prevention and treatment, spray once every 5-7 days. It is worth mentioning that when spraying pesticides, pay attention to the quality of the spray cloth. The top and bottom of the canopy, the inside and outside of the hearth, especially the back of the leaves should be sprayed to improve the control effect of diseases and insect pests. Disclaimer: Some articles of this website are transferred from the Internet. If the legal rights of third parties are involved, please inform this website for processing. phone 4 Wire Intercom Video Doorbell,4 Wire Intercom Video Doorbell Villa,4 Wire Connection 4 Wire Intercom System Zhuhai Mingke Electronics Technology Co., Ltd , https://www.mingke-tech.com